Season 1 - Jin-wook and Yoo-mi meet at a Gangwon-do resort and get caught up in a series of misunderstandings and accidents. Yoo-mi was charmed by Jin-wook's sly and playful personality, and they unexpectedly spend the night together. However, Yoo-mi disappears in the morning, leaving Jin-wook feeling perplexed and irrationally angry. Three years later, the two meet again when Yoo-mi becomes a nutritionist at the company cafeteria where Jin-wook works (imdb)